NDT Check | Non Destructive Testing

Ir-192 Exposure Time Calculator for Fix Thickness Steel Job

Steel Job Thickness (mm) : 4 6 8 10 12 14 16 18 20 22 25 28 30 32 35 36 38 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120

SFD (cm) . . . . . . . . . .:

Source Strenth (Ci) . :

Result (D-7 Films) . . . :

Result (Fast Films) . . . :

Ir-192 Exposure Time Calculator for Fix Thickness Steel Job

Table- for Thickness and that mortification factor value

Thickness in (mm)	Factor Value
4	0.025
6	0.028
8	0.031
10	0.034
12	0.038
14	0..041
16	0..045
18	0..05
20	0.054
22	0.06
25	0.068
28	0.081
30	0.088
32	0.099
35	0.11
38	0.13
40	0.14
45	0.16
50	0.232
55	0.304
60	0.376
65	0.496
70	0.64
75	0.776
80	1.04
85	1.34
90	1.7
95	2.2
100	2.64
105	3.5
110	4.5
115	6
120	7.4

Use of above table 

Exposure Time = FV x SFD x SFD / (Ci)

here is:    FV =        Mortification Factor Value according to job Thickness

                SFD =    Source to Film Distance in cm

                Ci = Source Current Activity in Ci

X-Ray Machine Exposure Time Table for Steel Job

here Fix Exposure time Table of Steel job according to Job Thickness and SFD given belows

Thickness in (mm)	KV (Voltage)	SFD (cm)	Exposure time (Current)
5	160	45	5 Points (30 seconds)
10	170	45	1.0 Minutes
16	200	60	1.7 Minutes
20	200	60	2.7 Minutes
25	200	60	3.0 Minutes
30	230	54	4 Minutes
32	230	54	6 Minutes
36	240	50	8 Minutes

Exposure Time Formula

Exposure Time = (FF × 2^(Thik/HVT) × SFD² × 60) / (Ci × RHM × 100²)

Where:
FF = Film Factor
Thik = Thickness
HVT = Half-Value Thickness
SFD = Source-to-Film Distance
Ci = Curie Intensity
RHM = Radiation Hazard Monitor

Exposure Time Formula

Exposure Time = (FF × 2^(Thik/HVT) × SFD² × 60) / (Ci × RHM × 100²)

Where:
FF = Film Factor
Thik = Thickness
HVT = Half-Value Thickness
SFD = Source-to-Film Distance
Ci = Curie Intensity
RHM = Radiation Hazard Monitor

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